Plastic Injection OEM Service – Bus Card Reader Manufacturing

Product Development of Bus Card Swiping Machine

The client provides payment hardware and systems for a local bank. At present, QR codes are widely used for mobile payment, and the old bus card swiping machines can no longer meet people’s daily needs. Therefore, the local bus operating company approached our customer to develop a new bus card swipe machine. It can read the bus card and recognize the QR code to connect to the bank settlement system.

When we received the 3D design drawings of plastic casings from the customer, we carefully analyzed the rationality of the design and the feasibility of the manufacturing process. Then our 3D printing prototype manufacturing supplier made 5 sets of 3D printing prototypes, and finally got an excellent prototype, which verified the customer’s product design. Next, our OEM manufacturing service can support our client in mould making and injection moulding.

What Is OEM Service for Plastic Injection Molding ?

Sungplastic plastic injection OEM services include injection molding, overmolding, insert molding & rubber molding.

Plastic Injection OEM Service Process

Select Product Material for Plastic Casing

According to our experience with plastic properties, we recommend PC/ABS plastic, in order to make the product have good strength and impact resistance, and enhance the life of the product. PC/ABS alloy is a polycarbonate modified material that has been industrially produced earlier. It is an important engineering plastic alloy that combines the advantages of PC and ABS. PC/ABS material combines the excellent characteristics of two materials, the formability of ABS material and the mechanical properties, impact strength and temperature resistance, and ultraviolet (UV) resistance of PC. It can be widely used in automotive trims, lamp shade handles and other parts, computer phones and electrical housing.

Define Product Color and Surface Finishes

Colors can be determined according to customer needs using international Pantone color charts. By adding toner to the plastic raw material, a plastic swatch that is very close to the color number is made. Finally, we show this plastic swatch to the customer and get their confirmation.

DFM Analysis and Improve Structure for Plastic Cases

These details are flaws in the original design. In face-to-face communication with our engineering team, the client fully understood these improvement points and readily agreed with all our suggestions. Our mold engineers have been in the industry for many years. Their experience and advice were invaluable in improving the expected quality of injection molded products, avoiding extensive mold modification work in advance.

Plastic Injection Mold design

Steel Mold Making for Plastic Cases

After the mold drawing is approved, it will be handed over to the mold fabrication department. Our mold technicians are experienced, and each mold has a special person responsible for the manufacturing management of the entire mold and the quality control of mold assembly.

Quality control at every step of mold making is important. For the dimensional inspection of each step in the manufacturing process, we require each processing personnel to self-check that there is no error, and then send it to the person in charge of the mold for a final inspection.

Mold manufacturing is generally divided into the following sections:

• Reprocessing after the mold base is customized, including CNC frame opening, milling machine drilling to manufacture water cooling/oil temperature heating systems, deep hole drilling/wire cutting of insert holes and thimble holes, etc.
• Processing of mold core materials after purchase, including wire cutting, milling machine drilling, CNC processing and EDM processing, etc.
• The processing of mold parts, including CNC turning, CNC milling, Sodick wire cutting, precision grinding, milling, EDM processing, etc., also needs to mark the parts at different positions with laser marking.
• Procurement and reprocessing of standard mold parts.
• Mold assembly and fitting

The final mold assembly and fitting process is the most important. Assembling these processed mold parts one by one requires not only accurate cooperation between them but also smooth mutual movement between them, so as to ensure that the mold can work stably during the injection molding process. The red paint on the surface of the mold core in the picture you see is the DIE oil painted in the mold fitting process. It can help us check the fit state of the front and rear mold cores after the mold is closed.

Plastic Injection OEM Production and Quality Control

After the tool assembly is confirmed, it will be sent to the injection molding technician of the injection molding department. Fix the tool on the injection molding machine of the corresponding tonnage for T0 mold trial and trial injection. In the plastic injection molding process, it is necessary to check whether the mold clamping and opening are smooth, whether the mutual movement between the mold core inserts is smooth, and whether the movement of the ejector structure is as designed. At this time, we generally need three workers on site, the injection molding technician, the mold technician responsible for the tool manufacturing, and the mold design engineer for the mold.

Adjusting the molding conditions of the injection molding machine includes parameters such as four-stage injection temperature, injection pressure, injection molding time and cooling time. Our injection molding technicians will gradually adjust according to experience and check the shape of the plastic parts after each trial. After many adjustments and attempts, we can get a very perfect plastic cover. Usually, this work lasts several hours.

After the customer confirms the test sample, we will carry out mass production according to the injection molding conditions recorded during the golden sample test. At the same time, the production management department has prepared SOP documents, let employees learn in the training session and strictly implement them in the injection molding production process. IPQC inspection work is also very important. With everyone’s joint efforts, we can control the quality of batch products.

Surface Treatment of Plastic Parts

Often, surface treatment follows plastic injection oem service. The general plastic surface finishes are spray painting, color matching, pad and silk screen printing, UV coating. The rich kinds of surface treatment can make the appearance of plastic products more beautiful, high-grade and comfortable. Your product should not only be fully manufactured but also perfectly displayed in the market.

Hand painting is also called rubber paint and elastic paint. Sprayed on the surface of the object, it is matte or semi-matte, it feels soft and smooth, and the appearance is elegant and solemn. The advantages of the hand-feel paint: it is in line with SGS green environmental protection and is harmless to the human body. Durable, strong scratch resistance, strong adhesion, impact resistance, self-healing, uniform smoothness and chemical resistance of the paint film, can cover imperfections, blemishes and watermarks on the surface, etc.

Rubber painting can be used on plastics such as ABS, PVC, as well as products and metal surfaces that are sprayed with special primers. A very typical example is our computer mouse, which has a skin-like texture to the touch. In addition, such as many sports equipment products, communication products, telephones, audio-visual products, binoculars, daily necessities, mobile phone casings, decorative boxes, game console handles, car interiors, microphones, craft gifts, beauty equipment, cosmetic brush handles, household appliances products, This surface coating process is also used on the outer surfaces of some products such as hair dryers, keyboards, electrical enclosures, etc.

What customers need to do for the middle shell and back cover is transparent high-gloss UV coating. This surface treatment process belongs to a photochemical reaction. Through a certain intensity of ultraviolet light irradiation, the UV paint is instantly cured, so that the surface of the product has the characteristics of high hardness, good gloss, scratch resistance, beautiful appearance, and good hand feeling, which can give people a strong appearance. It is easy to clean in the later stage and will not fade. It is widely used in the surface treatment of automobiles, electronics, communications, household appliances and other related products. So it is very reasonable for the customer to choose such a finish for his product.

We also have a silk screen pad printing production line. We can assist customers to screen-print some logos or logos to further improve the one-stop service and save time, communication costs and possible transhipment costs for customers.

Packaging and Shipping Services

The customer never has to worry about how to ship the product to them. Our company has been engaged in foreign trade for more than 18 years and has a stable contract for air and sea freight forwarding. As long as the customer informs us of his shipping plan, we will soon be able to help him consult a reasonable shipping fee and timeliness.

Contact Us to Get Plastic Injection OEM Services

As mentioned above, Sungplastic is an experienced injection molding OEM service factory. From communicating with customers, suggesting improvement plans, DFM analysis of plastic products, rapid prototypes creation, plastic mold design and manufacturing, injection molding, surface treatment, silk screen printing, and final shipping plans, we have been constantly improving our services. Make it easy for customers to go from order to delivery.

We are a leading provider of on-demand manufacturing services in China. Precision injection tooling and plastic molding are our core, while prototyping and CNC machining can better support the needs of low-volume production. We provide plastic injection molding and contract manufacturing in home appliances, consumer goods, electronics, LED lenses, industrial products, automotive, and energy markets.

When you choose Sungplastic, you get a professional partner through the entire production cycle. Timely, professional, and effective communication is always with you, taking your product from concept or drawing to reality.